- Study guides, Class notes & Summaries

Network+ N10-009 Layer 1 - Physical: Receives the frames and data and sends them via the local media (copper wires, fiberoptic cables, etc.) to the switches, routers, etc., along the network path. Layer 2 - Data link: - Receives the packets and adds physical addressing by adding sender and receiver MAC addresses to each data packet. - This information forms a unit called a frame. Layer 3 - Network: The routing layer (IP addresses, routers, packets). Layer 4 - Transport: The functions d...